Lord Buddha sought Nirvana under a Banyan tree. He found enlightenment and could free his life of the miseries that life presents us with. But as he had said, "Craving is root cause of all miseries", it seems it holds good even today. If you can free your soul of Cravings, you can surely find the true happiness within. Happiness is not just presence of people, luxuries or other beautiful things around us. It is a feeling of being truly content at heart, soul and mind. If one can feel satisfaction in his life and end his craving for materialistic things, he can truly walk on path of happiness.
This is probably not humanely possible, more so because in today's world money and power reign supreme. They are the top two things that everyone is running after. Ultimately both are supposed to give happiness - Happiness of being rich, richer and richest or Happiness of being powerful, more powerful and most powerful! But in most cases than not, they return misery.
Do you think the richest and most powerful man/ woman on this earth would be the happiest too? "No". The answer is "No".
One Craving leads to another and creates a long chain that just keeps extending along with our life. Though doing what Lord Buddha did is not possible today (leaving his kingdom and family to attain Enlightenment), the least we can try and do is to feel satisfied with what we have, to stop comparing our happiness on the basis of what others possess. This does not mean that we put an end to our ambitions, but means that we do not run a rat race.
Just as happiness is quite a relative feeling, feeling content, satisfied is also relative. To feel this peace within you, seek what gives you satisfaction and contentment. If it can make you feel at peace with yourself and your life, then probably you have attained your own small but significant "Nirvana" or Enlightenment - – a secret to Happiness!